Viscosimeter



June-29, 1943.

' viscos-IMETR Filed Dec. v, 1940 GNNGU I N VEN TOR.

f AToREY Patented June 29, 1943` UNITED STATES PATE NT OFFICE VISCOSIMETER George S. Binckley, Los lAngeles, Calif., assigner, by decree of court and mesne assignments, to' Sydney William Binckley, as trustee Application December 7, 1940,'Serial No. 369,009

' (ci. zes-11) Claims.

f the purpose stated which is simple of construction, accurate in operation, parts readily accespump 9 and the housing Il is a fitting 20, to which a tube 2| is connected leading exteriorly of the tank andthrough a fitting 22, the said tube 2| connects with a Bourdon tube 23. The Bourdon tube `in turn communicates with suitable linkage 24 adapted to actuate, in the present instance, some indicating instrumentality, such as a pen arm 25, the pen of which is adapted for play over a chart 26, which may be revolved by sible for removal, examination and cleaning, does not require a skilled operator, of few parts, in-

expensive in cost of manufacture, and generally superior.

With the above mentioned and other objects in view, the invention consists ln the novel and useful provision, formation, construction, 'association, and relative arrangement of parts, members and features, all as shown ina certain embodiment in the accompanying drawing, described generally, and more particularly pointed out in the claims.

In the drawing:

The figure is schematic and in section, and

i illustrates various instrumentalities entering into the construction of the device.

Referring now to the drawing, I provide a tank which may be of any form best adapted to enclose the elements hereinafter set forth.- This tank primarily acts to hold some liquid 2 therein,

`which liquid may be water, and within which liquid is placed some of the` various instrumentalities entering into the invention. In other words, the liquid acts as a water bath for certain of the apparatus. `Speciflcally,.the sample liquid under test is adapted to be directed by some means, such as a tube 3 into a container 4 of any form provided with a lter 5and overflow 5*. A tube 8 leads from the container l to a coil 1. the present instance, the coil is in the form `of a helix with a tube 8 `leading from said coil to a pump 9. This pump may be of the ordinary lntermeshing gear type, as shown at and Il,l

enclosed within a suitable casing |2, withlan eduction tube I3 leading from the pump casing to a housing I4. This housing I4 has depending therein, a capillary tube |5. The upper end of the housing is enlarged, as shown at I5, and between the enlargement and the part i1 of the housing, and carrying the capillary tube I5, is the support I3. An outlet member I9 communicates with the interior of the enlarged portion I5 of the housing M At some point intermediate the at l2.

the usual clockwork mechanism (not shown). Secured exteriorly of the tank I is a bracket 2l carrying a motor 28, the shaft 29 4of which motor is adapted tol drive a worm 30 in mesh with the .teeth of gear 3|, the gear 3| driving the pump gear I0. An end of the shaft carries a bevel gear 32 in mesh with bevel gear 33, gear 33 driving shaft 34, the end of which carries a propeller 3,5. Suitable'mounting brackets 36 are provided between the shafts 29 and 34.

3l is a relay in communication with a `source of electrical current 38. Leads 39.fromsaid relay communicate with a heating element 40 immersed in the liquid 2 in the tank 4| is a thermostat of the bimetal or mercury type adapted to be immersed within the liquid 2 and leads communicate with said thermostat and the relay 31 shown Suitable leads 43 connect with the motor 2B.

The operation, uses and advantages of the invention are as follows:

An essential condition for the successful operation of the recording and indicating viscosimeter is the constancy of the volume of liquid which is forced by the pump 9 through the capillary tube ,|5. This constancy of volume is assured by the use of a positive pump 9, whether it be of the gear type shown or of the reciprocating type having a constant rate of piston travel operated by a synchronous motor 23, or other source of power, which provides a constant rate of revolution through the worm and gear 30 and 3|, respectively, of the pump 9. The volume of liquid which is forced through the capillary tube I5 being constant, and the ,temperature of the liquid 2 within the tank being maintained at a constant standard (by the heatingelement I0 controlled by the thermostat 4| through relay 3l which permits energization and deenergization of said heating Velement 40, plus agitation of the liquid by the propeller 35), the pressure required to force this constant volume of liquid sample through the capillary tube l5 is an accurate measure of the absolute viscosity of the liquid sample, and the variations of this pressure, by acting through the Bourdon tube 23 provide on oi Ipump placed somewhere in the tubing t. Such f an arrangement wouldA provide for a positive pressure of the sample in its passage throughv the coil l to the capillary tube. l have shown the various essential elements of theinvention immersed in the water bath for the purpose of maintaining `the sample at a given temperature.

lt is obvious the passage of the sample through the helical coil 'l will bring the same to the given or selected temperature ofthe water bath :and further passage through the closed circuit formed by the coil, pum-p and capillary tube will maintain such given temperature. It is evident, however, that the connection with the Bourdon tube does j not require the maintenance of astandard temperature bath as operation of the tube is purely said liquid at a selected temperature to bring the sample liquid to such temperature, a pump connected with said coil, a capillary tube connected with the pump through which ther sample liquid is discharged, and said pump and capillary tube being also immersed in the body of liquid containing the coil to constantly maintain the sample liquid at said selected temperature.

3. A continuous flow viscosimeter including a coil to initially receive a sample liquid, a receptacle adaptedto hold a body of liquid, 1said coil being immersed in said body of liquid', means associated with said receptacle for maintaining said liquid at a selected temperature to bring the sample liquid to such temperature, a pump connected with said coil, a capillary tube connected with the pump through which the sample liquid is discharged, said pump and capillary tube being also immersed in the body of liquid con# taining the coil to constantly maintainthe sam- -ple liquid at said selectedtemperature, a Bourdon tube included between the pump yand capillary tube operated by pressure of -the sample liquid. and a recording device for indicating movement of the Bourdon tube.

4. A continuous ilow viscosimeterincluding a closed circuit for a sample' liquid comprising a coil, pump and capillary tube, a tank in which a matter of pressure and not of flow through a tube. cessive pressure, a safety valve is provided at Zl. The invention is easily calibrated and records accurately the absolute viscosity of the liquid.

I claim:

l. A continuous flow Viscosimeter including a coiLpump and capillary tube. connected in a To protect the Bourdon tube against exclosed circuit through which a sample liquid is passed for recording pressure variations, a tank adapted to hold a liquid, means for maintaining said liquid at a selected temperature, the coil, pump and capillary tube being arranged in the tank and immersed in the liquid to bring the sample liquid to and maintain the selected temperature of the tank contained liquid during its passage through the closed circuit, and a pressure recording device connected to the closed system between the pump and capillary tube and positioned outside of. the tank.

2. A continuous ow viscosimeter including a.

coil to initially receive a sample liquid, a recepsaid elements are arranged and adapted to contain a body of water, a gear for the pum and an agitator for thev body of Water, a motor ture to maintain the sample liquid at a constant' temperature.

5. A continuous ilow viscosimeter including a coil, pump and capillary tube successively connected in the order named to forma closed cir.-

tacle adapted tohold a body of liquid, said coil being immersed in. said body of4 liquid, means associated with said receptacle for maintaining cuit through which a sample liquid is passed for recording pressure variations, a receptacle adapted to contain a constant temperature bath in which said elements are immersed as a unit' to bring the sample liquid to the bath temperature during its passage through the coil and maintain such temperature during further passage of the liquid through the closed circuit, and means associated with said receptacle to maintain the constant temperature of the bath.

GEORGE S. BINCKLEY 

